System including a portable storage device equipped with a user proximity detector and method of preventing the loss thereof

ABSTRACT

A portable storage system. The portable storage system comprises a portable storage device having a flash memory element and a loss-prevention unit. The portable storage system further comprises Master and Slave proximity elements. One of the proximity elements is physically connected with the portable storage device, while the other is physically connected with the loss-prevention unit. The Master proximity element is configured to wirelessly determine the presence of the Slave proximity element within a predefined range.

FIELD AND BACKGROUND OF THE INVENTION

The present invention relates to a portable memory device and, moreparticularly but not exclusively, to a portable flash memory deviceequipped with a loss prevention mechanism.

During the last few years, the usage of portable flash memory deviceshas dramatically increased worldwide. One of the most common portableflash memory devices is a flash memory card that is integrated with aninterface that plugs into a computer's USB port. The USB flash drive isessentially a NAND-type flash memory integrated with a USB 1.1 or 2.0interface. It is a small, lightweight, removable and rewritable datastorage device of up to 64 GB. The USB flash drives are faster and morereliable than floppy disks which were previously used for relativelyquick portable storage.

The portable flash memory device emulates a small disk drive and allowsdata to be easily transferred from one computing unit to another. Theportable flash memory device usually consists of a small printed circuitboard encased in a plastic or metal casing, making the drive sturdyenough to be carried about in a pocket or on a lanyard. Usually only theUSB connector protrudes from the casing, and the connector is usuallycovered by a removable cover. Most flash drives feature the standardtype-A USB connection allowing them to be connected directly to a porton a personal computer. Most flash drives are active only when poweredby a USB computer connection, and require no other external power sourceor battery power source. Key drives are run off the limited supplyafforded by the USB connection. To access the data stored in a flashdrive, the flash drive has to be connected to a computer. Softwaredrivers are not required for the latest operating systems, but areavailable on the Web for legacy systems such as Windows 98, Windows NTand Mac OS 8.

Unlike a floppy disk, a compact disc (CD), a digital versatile disc(DVD) or any other writable storage medium which is commonly used forcreating a backup copy or a copy for delivery, the portable flash memorydevice is commonly used as a a portable rewritable storage device forthe personal and business usage of its owner. Thus, the portable flashmemory device commonly stores personal and confidential information.Such information may have high emotional and financial value to theowner of the portable flash memory device. Losing such a portable flashmemory device may be a real problem to its owner. It should be notedthat the standard portable flash memory device usually does not have anysecurity protection and anyone finding it can access all the data andfurthermore use the device at his own will.

Few solutions for the general problem of losing objects are known. Forexample, U.S. Pat. No. 6,297,737, issued on Oct. 21, 2001 to D. Irvin,discloses an object locating system. The system includes a locating unitthat comprises a wireless communication interface for transmittingsignals to one or more locating tags. When a tagged item is misplaced, asignal is transmitted from the locating unit. When the tag receives thesignal, an alarm is sounded. Additionally, the tag sends a response thatis received by the locating unit to give an indication that the taggeditem is nearby, even if the audio alarm cannot be heard.

Another solution is found in U.S. Patent Publication No. 2003/0034887,published on Feb. 20, 2003. U.S. Patent Publication No. 2003/0034887discloses an article locator system that employs a tracking transceiverand a handheld locator device. The tracking transceiver is attached tothe tracked article and is configured to send a response when it issignaled by the handheld locator device. The handheld locator devicedetermines the distance and/or direction to the tracking transceiver.Although the aforementioned solutions, which relate to the generalproblem of losing objects, can be adopted for tracking a lost portableflash memory device, none of them can prevent its actual loss. Moreover,the known solutions for the general problem of losing objects usuallyintegrate a locating unit. Such a unit must be accessible to the ownerof the lost portable flash memory device in order to allow him toperform the search. Thus, by adopting such a solution they require theowner to carry such a generic locating unit to any place at which hemight lose his portable flash memory device.

In addition, the locating tag, which is used in such solutions toindicate where the lost article can be found, is designed to beexternally attached to the article, for example the portable flashmemory device. Therefore, attaching such a locating tag to the portableflash memory device changes its structure, outer surface and appearance.Moreover, the locating tag is generic and therefore not adjusted tointerface with components of the portable flash memory device. Such astructure clearly limits the ability of the locating tag to interfacewith the memory and the memory control unit of the portable flash memorydevice.

There is thus a widely recognized need for, and it would be highlyadvantageous to have, a portable flash memory device with aloss-prevention mechanism which is devoid of the above limitations.

SUMMARY OF THE INVENTION

According to one aspect of the present invention there is provided aportable storage system. The system comprises a portable storage deviceand a loss-prevention unit. The system further comprises a Master andSlave proximity elements. One of the proximity elements is physicallyconnected with the portable storage device. The other of the proximityelements is physically connected with the loss-prevention unit. TheMaster proximity element is configured to poll in a wireless manner theproximity of the Slave proximity element within a predefined proximitythreshold.

Preferably, the portable storage device has a flash memory element.

More preferably, the portable storage device further comprises adata-transferring interface electrically connected with the flash memoryelement; the data-transferring interface is configured to be coupled toa hosting unit.

Preferably, the portable storage system further comprises a userindication element electrically connected with the Master proximityelement, the user indication element configured to activate an alarmwhen triggered.

More preferably, the Master proximity element is configured to triggerthe user indication element when the Slave proximity element is notdetected within the predefined proximity threshold.

More preferably, the user indication element comprises a timer elementoperable to delay the trigger for a predefined time interval, thepredefined time interval starting when the Slave proximity element isnot within the predefined proximity threshold.

More preferably, the alarm comprises at least one member of thefollowing group: an audible alarm, a visual alarm, and a tactile alarm.

More preferably, the alarm comprises a wireless communicationtransmitter configured to transmit an alarming message to a wirelesscommunication receiver.

More preferably, the visual alarm is performed using a light emittingdiode (LED).

More preferably, the tactile alarm is performed using a vibrating unit.

Preferably, the Master proximity element is a network of sensors isconfigured to wirelessly poll the proximity of the Slave proximityelement within a predefined area.

Preferably, the Slave proximity element is a network of proximityelements, wherein the Master proximity element is configured towirelessly poll the proximity of each one of the proximity elementswithin a predefined proximity threshold, thereby determining whether theMaster proximity element is located within the boundaries of apredefined area.

Preferably, the portable storage system further comprises a encryptingmodule electrically connected with the flash memory element and theMaster proximity element, wherein the Master proximity element isconfigured to trigger the encrypting module when the Slave proximityelement is not detected within the predefined proximity threshold, theencrypting module is configured to encrypt information stored on theflash memory element when triggered.

Preferably, the loss-prevention unit is adapted to be detachably coupledto the portable storage device.

More preferably, the data-transferring interface is a member of thefollowing group: a Universal Serial Bus (USB) connector, a wirelesscommunication unit, an USB2 connector, and a FireWire™ connector.

More preferably, the portable storage device comprises a case withinwhich the flash memory element and at least a portion of thedata-transferring interface are mounted.

More preferably, the loss-prevention unit is shaped as a cover for aportion of the data-transferring interface, which projects from theportable storage device.

Preferably, the portable storage system further comprises acommunication module electrically connected with the data transferringinterface and the Master proximity element, wherein the Master proximityelement is configured to trigger the communication module when the Slaveproximity element is not detected within the predefined proximitythreshold, the communication module is configured to instruct thehosting computing unit to send a message to a predefined address.

More preferably, the predefined address is a member of the followinggroup: an email address, a phone number, and a pager number.

More preferably, the message address is a member of the following group:a Short Message Service (SMS), pager message, an electronic message, avoice message, a visual message, and a tactile message.

More preferably, the communication module is configured to instruct thehosting computing unit to activate a designated protection application;the designated protection application is configured to protectinformation stored on the memory of the hosting computing unit.

More preferably, the protect address is a member of the following group:encrypt, lock access, and delete.

Preferably, the Slave proximity element is connected to a battery.

Preferably, one of the Master and Slave proximity elements comprises atransmitter, and the other of the Master and Slave proximity elementscomprises a receiver adapted for communication with the transmitter.

More preferably, the transmitter is configured for broadcasting an RFsignal to the receiver, the receiver is configured for receiving the RFsignal.

More preferably, the transmitter is a radio frequency identification(RFID) transmitter, and the receiver is an RFID receiver.

More preferably, the transmitter is a Infrared (IR) transmitter, and thereceiver is an IR receiver.

More preferably, the transmitter and the receiver perform radiocommunication according to a Bluetooth® communication protocol.

More preferably, the transmitter is a transponder and the receiver is atransceiver, the transmitter configured for broadcasting the RF signalas a reply signal to an interrogation signal of the transmitter.

According to one aspect of the present invention there is provided amethod for preventing the loss of a portable storage device. The methodcomprises the following steps: a) determining whether the portablestorage device is coupled to a loss-prevention unit, b) if the portablestorage device is not coupled to the loss-prevention unit, determiningwhether the distance between the portable storage device and theloss-prevention unit is within a predefined proximity threshold, and c)activating an alarm if the portable storage device is not within theproximity threshold.

Preferably, the activating is done a predefined period after theportable storage device has been separated from the loss-preventionunit.

According to one aspect of the present invention there is provided aportable storage device that comprises a main body including a flashmemory element and a first proximity element configured to communicatewith a second proximity element. One of the proximity elements isconfigured to wirelessly poll the presence of the other of the proximityelements within a predefined range.

Preferably, the second proximity element is coupled to a detachablecover which is adjusted to fit a portion projecting from the portablestorage device.

Preferably, the portable storage device of claim 32 further comprises auser indication element electrically connected with one of the first andsecond proximity elements, the user indication element configured toactivate an alarm when triggered.

Preferably, the one of the proximity elements is configured to triggerthe user indication unit when the other of the proximity elements is notdetected within the predefined range.

Preferably, the user indication unit comprises a timer element operableto delay the trigger for a predefined time interval, the predefined timeinterval starting at when the other of the proximity elements is notdetected within the predefined range.

Preferably, the alarm comprises at least one member of the followinggroup: an audible alarm, a visual alarm, and a tactile alarm.

According to one aspect of the present invention there is provided aportable storage system that comprises a portable storage device havingstored content, a loss-prevention unit, and Master and Slave proximityelements. The Master proximity element is physically connected with theportable storage device. The Slave proximity element is physicallyconnected with the loss-prevention unit. The Master proximity element isconfigured to operate the portable storage device to protect the storedcontent when the Slave proximity element is outside a predefinedproximity threshold.

According to one aspect of the present invention there is provided aportable storage system that comprises a portable storage device havingstored content, a loss-prevention unit, and Master and Slave proximityelements. The Master proximity element is physically connected with theportable storage device. The Slave proximity element is physicallyconnected with the loss-prevention unit. The Master proximity element isconfigured to operate the portable storage device to issue a networkcommunication to alert an owner when the Slave proximity element isoutside a predefined proximity threshold.

Unless otherwise defined, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention belongs. The materials, methods, andexamples provided herein are illustrative only and are not intended tobe limiting.

Implementation of the method and system of the present inventioninvolves performing or completing certain selected tasks or stepsmanually, automatically, or a combination thereof. Moreover, accordingto actual instrumentation and equipment of preferred embodiments of themethod and system of the present invention, several selected steps couldbe implemented by hardware or by software on any operating system of anyfirmware or a combination thereof. For example, as hardware, selectedsteps of the invention could be implemented as a chip or a circuit. Assoftware, selected steps of the invention could be implemented as aplurality of software instructions being executed by a computer usingany suitable operating system. In any case, selected steps of the methodand system of the invention could be described as being performed by adata processor, such as a computing platform for executing a pluralityof instructions.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is herein described, by way of example only, withreference to the accompanying drawings. With specific reference now tothe drawings in detail, it is stressed that the particulars shown are byway of example and for purposes of illustrative discussion of thepreferred embodiments of the present invention only, and are presentedin order to provide what is believed to be the most useful and readilyunderstood description of the principles and conceptual aspects of theinvention. In this regard, no attempt is made to show structural detailsof the invention in more detail than is necessary for a fundamentalunderstanding of the invention, the description taken with the drawingsmaking apparent to those skilled in the art how the several forms of theinvention may be embodied in practice.

In the drawings:

FIG. 1 is a perspective view of an exemplary portable flash memorysystem which comprises a flash memory device and a loss-preventionelement, according to an embodiment of the present invention;

FIG. 2 is a perspective view of the loss-prevention mechanism thatcomprises Master and Slave Bluetooth® elements, according to anembodiment of the present invention;

FIG. 3A is a perspective view of the components of an exemplary portableflash memory system, showing the top surface thereof, according to apreferred embodiment of the present invention;

FIG. 3B is a perspective view of the portable flash memory system ofFIG. 3A when the flash memory device and the loss-prevention element arecoupled, according to a preferred embodiment of the present invention;

FIG. 4 is a perspective view of an exemplary portable flash memorysystem in which a user indication unit is connected to a proximityelement at the flash memory device, according to an embodiment of thepresent invention; and

FIG. 5 is a simplified flowchart diagram of a three-step process forproviding a method for preventing the loss of a portable flash memorydevice, according to a preferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present embodiments comprise an apparatus, a system and a method fora portable memory device having an integrated loss-prevention mechanism.

The principles and operation of an apparatus, system and methodaccording to the present invention may be better understood withreference to the drawings and accompanying description.

Before explaining at least one embodiment of the invention in detail, itis to be understood that the invention is not limited in its applicationto the details of construction and the arrangement of the components setforth in the following description or illustrated in the drawings. Theinvention is capable of other embodiments or of being practiced orcarried out in various ways. Also, it is to be understood that thephraseology and terminology employed herein is for the purpose ofdescription and should not be regarded as limiting.

One embodiment of the present invention is related to a portable storagesystem, with a loss-prevention mechanism. The system comprises aportable storage device, such as a USB drive, that includes a flashmemory element, such as a non-volatile memory that can be electricallyerased and reprogrammed. The system further comprises a loss-preventionelement which is configured to be retained by the user when the portablestorage device is in use. In one embodiment of the present invention,the loss-prevention element is shaped as a cover to the portable storagedevice. In such an embodiment, the portable storage device has astandard USB connector, as in commonly used USB drives, and theloss-prevention element is shaped to cover the projected portionthereof. The loss-prevention mechanism of the portable storage systemcomprises Master and Slave proximity elements. One of the proximityelements is physically connected to the portable storage device. Theother is physically connected to the loss-prevention element. The Masterproximity element is configured to wirelessly verify the presence of theSlave proximity element within a predefined range. The Master proximityelement is, preferably, electrically connected to a user indication unitwhich is used to inform the user about a potential loss. The userindication unit triggers an integrated alarm when the loss-preventionelement is removed and is located a sufficient distance away from theflash memory device.

Another embodiment of the present invention is related to a method forpreventing the loss of a portable storage device. The method comprises anumber of steps. In the first step, it is determined whether theportable storage device is coupled to a loss-prevention element. If theportable storage device and the loss-prevention element are not coupled,then it is determined whether the distance between the portable storagedevice and the loss-prevention element is within a predefined range. Ifthe distance between the portable storage device and the loss-preventionis not within the predefined range, then an alarm is activated.

Reference is now made to FIG. 1, which depicts a portable flash memorysystem 1 that comprises a flash memory device 3 and a loss-preventionelement 2, according to an embodiment of the present invention.

The flash memory device 3 comprises a memory unit 4 and adata-transferring interface 8. The memory unit 4 is, preferably, a flashmemory which is a constantly-powered nonvolatile memory. The flashmemory is an EEPROM (Electrically Erasable Programmable Read OnlyMemory) which is erasable and modifiable at the block level, so thatperformance speed is fast. Such flash memory is currently in use in avariety of apparatuses and systems, including digital cellular phones,digital cameras, LAN (Local Area Network) switches, PC cards, anddigital setup boxes or inner controllers for notebook computers. Thememory unit 4 is electrically connected to the data-transferringinterface 8 that allows external computing units, such as personal andportable computers, to access the information which is stored in thememory unit 4. Preferably, the data-transferring interface 8 comprises aUSB connector, as defined in USB 1.0, USB 1.1 or USB 2.0 specificationsthat are herein incorporated in their entirety by reference. Thedata-transferring interface 8 further comprises a USB controller whichis used to manage the logical channels of the USB connector. The logicalchannels are configured as byte streams in order to allow externalcomputing units to access and communicate with the memory unit.Preferably, the portable flash memory system 1 is configured to functionas a commonly known USB drive. When the user plugs the USB connectorinto a USB port, the computer's operating system recognizes the deviceas a removable drive and assigns it a drive letter. Such a jump drivedoes not require rebooting after it is attached and supplies power tothe flash memory device 3. As such, additional features such as passwordprotection and downloadable drivers may be integrated into the flashmemory device 3.

The portable flash memory system 1 further comprises two proximityelements, 5 and 6, integrated into the flash memory device 3 and theloss-prevention element 2, respectively. The two proximity elements 5, 6are configured in a manner that allows at least one of them towirelessly determine the presence of the other within a predefinedrange. As further described below, the interrogation process isinitiated only when the loss-prevention element 2 is separated from theflash memory device 3. For the sake of simplicity and clarity, theproximity element which is configured to determine the presence of theother proximity element in a predefined range is defined as a Masterproximity element, and the other proximity element is defined as a Slaveproximity element.

In one embodiment of the present invention, the Slave proximity elementis a transmitting circuit and the Master proximity element is areceiving circuit. Such proximity elements 5, 6 allow the establishmentof a wireless communication path between the flash memory device 3 andthe loss-prevention element 2. The wireless communication path allowsthe transmission of data by the transmitting circuit in a manner thatprovides location information to the receiving circuit. Such anembodiment allows the receiving circuit to interrogate the presence ofthe transmitting circuit within a predefined range, preferably accordingto the strength of the transmitting circuit's transmissions. Thus, ifthe transmitting circuit is integrated into flash memory device 3 andthe receiving circuit is integrated into the loss-prevention element 2,the loss-prevention element 2 can be used to interrogate the presence ofthe flash memory device 3 within a predefined range, and vice versa.

Preferably, the transponder and receiving circuits are configured asparts of a radio frequency identification (RFID) system. Thetransmitting circuit comprises a radio frequency (RF) transponder with adigital memory chip. The receiving circuit comprises an RF antenna. Whenactivated, the RF transponder sends an RF signal to the RF antenna ofthe receiving circuit. The RF signal preferably comprises a uniqueidentification code. It should be noted that the RF transponder may beactivated by a wireless interrogation signal, sent by the receivingcircuit, or by a wireline signal, sent from a presence detection unit,as described below. The receiving circuit verifies that theidentification code is registered as related to the memory main body.The reception of the RF signal at a certain strength indicates to thereceiving circuit that the transmitting circuit is within the predefinedrange. In such an embodiment, as depicted in FIG. 3, the Masterproximity element 6 further comprises a user indication unit 7 that iselectrically connected to a receiving circuit and configured to betriggered thereby. Preferably, if the receiving circuit does not receivethe identified RF signal or receives a weak identified RF signal, thereceiving circuit triggers the user indication unit. Thus, when aloss-prevention element 2 is moved a sufficient distance away from theflash memory device 3, the Master proximity element 6 no longer receivesthe RF signal of the Slave proximity element 5 and therefore triggersthe user indication unit.

In another embodiment of the present invention, the Slave proximityelement is a Bluetooth® (BT)-Slave element and the Master proximityelement is a BT-Master element. It should be noted that the termBT-element might refer to a short-range radio communication device in ashort-range area, which communicates using the BT protocols.

Reference is now made to FIG. 2, which depicts Master 201 and Slave 200BT elements, according to an embodiment of the present invention. Whenactivated, the Master BT-element 201 is configured to detect thepresence of the Slave BT-element 200 within a predefined range. If theSlave BT-element 200 is not detected, the Master BT-element 201 triggersthe user indication unit. The trigger prompts the user indication unitto alarm the user, as further described below.

Each one of the BT-elements comprises a communication element. TheBT-Master element preferably comprises an RF receiver 202 and theBT-Slave element preferably comprises an RF transmitter 204. It shouldbe noted that transceivers may be used instead of the receiver 202 andtransmitter 204. Each one of the communication elements 202 and 204 iselectronically connected to a baseband processing unit 203 and 205,respectively. Each one of the baseband processing units 203 and 205 isconnected to a respective control unit 206 and 207, which is configuredto transmit data in packets. The RF transmitter 204 is configured tomodulate encoded packets received from baseband processing unit 205 to apredetermined frequency band for radio transmission, to amplify and totransmit the modulated data packet. Preferably, the RF receiver 202 isconfigured to receive, and preferably amplify, received signals of apredetermined frequency band. It should be noted that each one of thecommunication elements may be a transceiver which is configured both asa receiver and as a transmitter. When activated, the Slave control unit207 is configured to establish a baseband transmission to the MasterBT-element 201. The connection is established by instructing the SlaveRF transmitter 204 to send an RF signal 208 to the Master RF receiver202. The Master control unit 206 periodically checks the RF power levelof the RF signal 208 that is received through the Master RF receiver202. Then, the Master control unit 206 determines whether the measuredRF power level of the RF signal 208 is less than a predetermined level.In one embodiment of the present invention, the predetermined levelcorresponds to a receiving level that the Master RF receiver 202receives from the Slave RF transmitter 204 when the distance between theflash memory device and the loss prevention element is about 10 meters,or alternatively one or two meters or any suitable distance. If thepower level of the RF signal 208 is less than the predetermined level,the Master RF receiver 202 triggers the user indication unit 7.

In another embodiment of the present invention, the Slave proximityelement is an Infrared (IR) transmitter and the Master proximity elementis an IR receiver.

Reference is now made to FIGS. 3A and 3B, each of which is a perspectiveview of the remote portable flash memory system 1 represented in FIG. 1.In FIG. 3A, the flash memory device 3 comprises a durable housing 10that encompasses the memory unit 4 (FIG. 1) and a part of thedata-transferring interface 8 (FIG. 1). In the depicted embodiment, thedata-transferring interface is a USB connector 18, which is electricallyconnected with the memory element in the inside of the housing 10. TheUSB connector 18 projects from the front end of the flash memory device3. Moreover, in the embodiment that is depicted in FIG. 3A, theloss-prevention element 2 is shaped as a detachable cover 12, where thedetachable cover 12 is forcibly fitted to cover the projected portion ofthe USB connector 18.

The portable flash memory system is designed to provide a user with aloss prevention mechanism that can minimize the chances of losing thedevice or of exposing the information stored therein to unauthorizedusers. As described above, to the portable flash memory system 1(FIG. 1) comprises two proximity elements. One of the proximity elementsis attached to the flash memory device 3 and the other is attached tothe loss-prevention element 2 shaped as a detachable cover 12.Preferably, when the flash memory device 3 and the detachable cover 12are coupled, the loss prevention mechanism is disabled. Only when theyare separated, the loss prevention mechanism is activated and one of theproximity elements starts determining the presence of the otherproximity element, as described above. Preferably, the portable flashmemory system 1 comprises a proximity or presence arrangement. Sucharrangements are predominantly used with safety devices. The proximityor presence arrangement is configured to detect when the detachablecover 12 and the flash memory device 3 are coupled, as shown in FIG. 3Bor are separated, as shown in FIG. 3A. Preferably, the arrangementcomprises a presence switch 100, which is mounted on the flash memorydevice 3, to sense the presence of the detachable cover 12. When thepresence switch 100 senses the detachable cover 12, the loss preventionmechanism is disabled.

In use, when the detachable cover 12 is separated from the flash memorydevice 3, as shown in FIG. 3A, the loss prevention mechanism isactivated. In one embodiment of the present invention, the proximityelement of the detachable cover 12 is configured as the Master elementand the proximity element of the flash memory device 3 is configured asthe Slave proximity element. In such an embodiment, the Master proximityelement is electrically coupled to a user indication unit 7, which isused to inform the user when the detachable cover 12 is moved asufficient distance away from the flash memory device 3. The userindication unit 7 preferably comprises a control circuit and an alarm.The control circuit is used to translate the outputs of the Masterproximity element to trigger the user indication unit 7 alarm. The alarmis a device that is configured to alert the user. In FIGS. 3A and 3B theuser indication unit 7 is a LED, preferably red. Preferably, whenactivated, the LED flashes On and Off. However, many other alarms may beused. The alarm may provide an audible, visual, or tactile stimulus. Theaudible stimulus may be produced using a miniature speaker or buzzer orother sound source. The visual stimulus may be produced using a lightsource, as depicted in FIGS. 3A and 3B. The tactile stimulus may beproduced using a vibrating module. The user indication unit 7 maycomprise a combination of alarms in order to ensure that the user isalerted. A battery or other portable power supply provides power for theuser indication unit 7. In one embodiment, the user indication unit 7comprises a Bluetooth® transmitter. The Bluetooth® transmitter isconfigured to send a message to a paired device, such as the user mobilephone or personal digital assistant (PDA) when the detachable cover 12is moved a sufficient distance away from the flash memory device 3.

Preferably, the user indication unit 7 comprises a timer module. Thetimer module is configured to delay the activation of the alarm for apredefined period. Such an embodiment reduces the chances that the alarmwill be activated when there is a lack of communication between theproximity elements for a short time or when the proximity elements aredrawn away from each other for a short period of time.

The timer module is configured to interrupt the control circuit of theuser indication unit 7 for a predefined amount of time after the Masterproximity element triggers the user indication unit 7. The timer moduleis reset when the Master proximity element senses the presence of theSlave proximity element. If the presence of the Slave proximity elementis not sensed, the control circuit is reconnected and a control signalcauses the control circuit to activate the alarm. For example, in oneembodiment of the invention, the timer module delays the activation ofthe alarm if, for half or one minute after the user indication unit 7has been triggered, the presence of the Slave proximity element is notsensed.

Preferably, as shown in FIGS. 3A and 3B, the detachable cover 12 has anopening 101 configured to receive a key ring 102. Such a key ring 102can be used to couple the detachable cover 12 to a key holder, a cloth,or another article in order to avoid losing the detachable cover 2. Insuch an embodiment, losing of both the detachable cover 12 and the flashmemory device 3 can be avoided.

It should be noted that the portable flash memory system 1 can be usedas a loss-prevention mechanism for a coupled computer unit. As describedabove, the portable flash memory device 3 is configured to be pluggedinto a suitable port, such as a USB port in a computing unit. As furtherdescribed above, if the presence of the portable flash memory device 3is not detected within the predefined range relative to theloss-prevention element 2, the loss-prevention element 2 activates analarm. Thus, if the flash memory device 3 is plugged into a portablecomputing unit such as a laptop, and the portable computing unit istaken away from the user, the alarm is activated, as described above,notifying the owner of the portable computing unit about the potentialloss.

Reference is now made to FIG. 4, which depicts another embodiment of thepresent invention. The memory unit 4, the data transferring interface 8,and the proximity elements 5, 6 are as in FIG. 1 above. However, in thepresent embodiment, a user indication unit 7 is electrically connectedto the proximity element 5 of the flash memory device 3. In such anembodiment, the user indication unit 7 may alert the user, as describedabove, when the presence of the Slave proximity element is not detectedwithin a predefined range. In such an embodiment, the proximity element6 of the loss prevention element 2 is the Slave element and theproximity element 5 of the flash memory device 3 is the Master proximityelement 6.

As described above, the portable flash memory system 1 may be used as acommon plug-and-play portable storage device. A common plug-and-playportable storage device is used when coupled to a computing unit. Thecomputing unit is used for accessing the information that is stored inthe memory unit 4. In order to couple the portable flash memory system 1to a computing unit, the user plugs the device into a suitable port,such as a USB port, in the computing unit. When coupled, the computer'soperating system recognizes the device as a removable drive and assignsit a drive letter. The coupling allows the user of the computing unit toaccess information stored on the memory unit. Allowing such access canbe undesirable if the portable flash memory system 1 has been forgottenwhen coupled to a certain computing unit that serves other users.

In one embodiment of the present invention, the user indication unit 7is electronically connected to the main memory unit 4. The userindication unit 7 preferably comprises an encrypting module 300. Whenactivated, the encrypting module 300 is configured to encrypt theinformation that is stored on the main memory unit 4. Such an embodimentensures that unauthorized users cannot copy, delete or destroy anyinformation which is stored on the memory unit 4. As described above,the Master proximity element is configured to trigger the userindication unit 7 when the presence of the Slave proximity element isnot detected within a predefined range or within a certain period oftime after the presence of the Slave proximity element has not beendetected within a predefined range. Preferably, the user indication unit7 is configured to activate the encrypting module 300 when triggered.When activated, the encrypting module 300 encrypts the information thatis stored on the memory unit 4, thereby preventing unauthorized usersfrom accessing the information. In one embodiment of the presentinvention, the encrypting module 300 allows the owner of the portableflash memory system 1 to submit a certain password for decrypting theencrypted information. Preferably, the user indication unit 7 isconfigured to disable all the components of the main memory unit 4 untila password is inserted. Preferably, the user indication unit 7 isfurther configured to disable all the components of the main memory unit4 until the presence of the loss-prevention element 2 is detected withinthe predefined range relative to the portable flash memory device 3.Such an embodiment promises that even if the password is stolen, themain memory unit 4 is not activated without the presence of theloss-prevention element 2.

In one embodiment of the present invention, the user indication unit 7comprises a communication module (not shown) that is configured tocommunicate with the operating system of the coupled computer unit. Thecommunication module is preferably electrically connected to thedata-transferring interface 8 in a manner that allows it to communicatewith the hosting computing unit, as described below. In such anembodiment, the communication module may be used, when activated, toinstruct the operating system of the computing unit to initiate one ormore processes that inform the owner of the portable flash memory system1 as to the current location of the portable flash memory system 1. Insuch an embodiment, when the user indication unit 7 is triggered, thecommunication module instructs the operating system to send an email toa predefined address. Preferably, the communication module instructs theoperating system to send a message to a central server. The centralserver is configured to send an email message, a short message service(SMS) message, a pager message, a tactile message, or another suitablemessage to a predefined address which may be accessed by the owner ofthe portable flash memory device 3. Preferably, the central server isconfigured to send the same message to more than one address orcommunication device.

It should be noted that in one embodiment of the present invention, perof Master and Slave proximity elements is coupled to the flash memorydevice 3 and another per of Master and Slave proximity elements iscoupled to the loss prevention element 2. In such an embodiment, theuser can be alarmed by a user indication unit 7 which is connected tothe loss prevention element 2 while an encrypting module, which isconnected to the flash memory device 3, may be used to encrypt theinformation that is stored on the main memory unit 4. Other functions,which are brought hereinabove, can also be parallelly performed.

In one embodiment of the present invention, the portable flash memorysystem 1 is used as a loss-prevention mechanism for the coupled computerunit. As described above, the portable flash memory system 1 integratesa communication module which is configured to communicate with theoperating system of the coupled computer unit. Such a module can be usedto instruct the operating system of the hosting device when the presenceof the portable flash memory device 3 is not detected within thepredefined range relative to the loss-prevention element 2. Such anembodiment can be useful when the computing unit is a laptop or anotherportable computing unit that can easily be forgotten or stolen. When theportable flash memory device 3 is plugged into a suitable port, such asa USB port, in the portable computing unit, it can communicate with theoperating system of the portable computing unit. Preferably, theportable computing unit hosts a designated protection application whichcan be used to block access to the memory of the portable computing unitor to activate other protection or locking measures to the informationwhich is stored on the memory of the portable computing unit. In oneembodiment of the present invention, when the presence of theloss-prevention element 2 is not detected within the predefined rangerelative to the portable flash memory device 3, the Master proximityelement 5 triggers the communication module. The communication moduleinstructs the operating system of the hosting device to activate thedesignated protection application. The designated protection applicationthen locks the information stored on the memory of the computing device.Other functions, such as deleting, encrypting, or activating a passwordprotection can be activated by the application in order to protect thestored information. Such an embodiment ensures that the informationwhich is stored on the memory of the portable computing device is safeeven when the user, with the loss-prevention element 2, draws away fromthe portable computing device. In such an embodiment, if the portablecomputing device is stolen, the information which is stored in theportable computing device memory is safe.

In one embodiment of the present invention, the presence of the portableflash memory device 3 is configured to be detected within the boundariesof a area which is covered using a presence detection network.Preferably, the presence detection network comprises a number of Masterproximity elements which are used to determine whether one or more flashmemory devices are located within the boundaries of the presencedetection network. Such an embodiment may be used to assist a securitymanager of a certain company in supervising on the remaining of the oneor more flash memory devices in a certain area. The presence detectionnetwork is preferably connected to a user indication element which isused to alarm the security manager when the presence of one or more ofthe flash memory devices is not detected within the boundaries of thedetection network. In another embodiment of the present invention, thepresence detection network comprises a number of Slave proximityelements. In such an embodiment, each one of the flash memory devices isconfigured to determine whether it is located within the boundaries ofthe of Slave proximity elements' network. In such an embodiment theflash memory device 3 may be connected to an encrypting module which isconfigured to encrypt information stored on the flash memory elementwhen the flash memory device 3 is removed from the boundaries of theSlave proximity elements' network.

Reference is now made to FIG. 5, which is a flowchart that illustrates athree-step process for preventing the loss of a portable flash memorydevice, according to a preferred embodiment of the present invention.During the first step, 401, the system is checked to determine whetherthe portable storage device is coupled to the loss-prevention element.If the portable storage device and the loss-prevention element are notcoupled, then, as shown at 402, it is determined whether the portablestorage device is within a predefined range relative to theloss-prevention element. In one embodiment, as described above, aproximity element, which is coupled either to the portable storagedevice or to the loss-prevention element, is used to determine ifanother proximity element, which is attached to the other of theportable storage device or of the loss-prevention element, is presentwithin a predefined range. In the following step, 403, if the presenceof the portable storage device is not detected within the predefinedrange relative to the loss-prevention element, the user is alerted abouta potential loss of the portable storage device.

It is expected that during the life of this patent many relevant devicesand systems will be developed and the scope of the terms herein,particularly of the terms flash memory, packets, memory, interface areintended to include all such new technologies a priori.

It is appreciated that certain features of the invention, which are, forclarity, described in the context of separate embodiments, may also beprovided in combination in a single embodiment. Conversely, variousfeatures of the invention, which are, for brevity, described in thecontext of a single embodiment, may also be provided separately or inany suitable subcombination.

Although the invention has been described in conjunction with specificembodiments thereof, it is evident that many alternatives, modificationsand variations will be apparent to those skilled in the art.Accordingly, it is intended to embrace all such alternatives,modifications and variations that fall within the spirit and broad scopeof the appended claims. All publications, patents, and patentapplications mentioned in this specification are herein incorporated intheir entirety by reference into the specification, to the same extentas if each individual publication, patent or patent application wasspecifically and individually indicated to be incorporated herein byreference. In addition, citation or identification of any reference inthis application shall not be construed as an admission that suchreference is available as prior art to the present invention.

1. A portable storage system, comprising: a portable storage device; aloss-prevention unit; and Master and Slave proximity elements, one ofsaid proximity elements being physically connected with said portablestorage device, the other of said proximity elements being physicallyconnected with said loss-prevention unit, said Master proximity elementbeing configured to wirelessly poll the proximity of said Slaveproximity element within a predefined proximity threshold.
 2. Theportable storage system of claim 1, wherein said portable storage devicehaving a flash memory element.
 3. The portable storage system of claim2, wherein said portable storage device further comprises adata-transferring interface electrically connected with said flashmemory element, said data transferring interface being configured to becoupled to a hosting unit.
 4. The portable storage system of claim 1,further comprising a user indication element electrically connected withsaid Master proximity element, said user indication element configuredto activate an alarm when triggered.
 5. The portable storage system ofclaim 4, wherein said Master proximity element is configured to triggersaid user indication element when said Slave proximity element is notdetected within said predefined proximity threshold.
 6. The portablestorage system of claim 4, wherein said user indication elementcomprises a timer element operable to delay said trigger for apredefined time interval, said predefined time interval starting whensaid Slave proximity element is not within said predefined proximitythreshold.
 7. The portable storage system of claim 4, wherein said alarmcomprises at least one member of the following group: an audible alarm,a visual alarm, and a tactile alarm.
 8. The portable storage system ofclaim 4, wherein said alarm comprises a wireless communicationtransmitter configured to transmit an alarming message to a wirelesscommunication receiver.
 9. The portable storage system of claim 7,wherein said visual alarm is performed using a light emitting diode(LED).
 10. The portable storage system of claim 7, wherein said tactilealarm is performed using a vibrating unit.
 11. The portable storagesystem of claim 1, wherein said Master proximity element is a network ofsensors being configured to wirelessly poll the proximity of said Slaveproximity element within a predefined area.
 12. The portable storagesystem of claim 1, wherein said Slave proximity element is a network ofproximity elements, wherein said Master proximity element beingconfigured to wirelessly poll the proximity of each one of saidproximity elements within a predefined proximity threshold, therebydetermining whether said Master proximity element is located within theboundaries of a predefined area.
 13. The portable storage system ofclaim 2, further comprising a encrypting module electrically connectedwith said flash memory element and said Master proximity element,wherein said Master proximity element is configured to trigger saidencrypting module when said Slave proximity element is not detectedwithin said predefined proximity threshold, said encrypting module beingconfigured to encrypt information stored on said flash memory elementwhen triggered.
 14. The portable storage system of claim 1, wherein saidloss-prevention unit is adapted to be detachably coupled to saidportable storage device.
 15. The portable storage system of claim 3,wherein said data-transferring interface is a member of the followinggroup: a Universal Serial Bus (USB) connector, a wireless communicationunit, an USB2 connector, and a FireWire™ connector.
 16. The portablestorage system of claim 15, wherein said portable storage devicecomprises a case within which said flash memory element and at least aportion of said data-transferring interface are mounted.
 17. Theportable storage system of claim 15, wherein said loss-prevention unitis shaped as a cover for a portion of said data transferring interfacewhich projects from said portable storage device.
 18. The portablestorage system of claim 3, further comprising a communication moduleelectrically connected with said data transferring interface and saidMaster proximity element, wherein said Master proximity element isconfigured to trigger said communication module when said Slaveproximity element is not detected within said predefined proximitythreshold, said communication module being configured to instruct saidhosting computing unit to send a message to a predefined address. 19.The portable storage system of claim 18, wherein said predefined addressis a member of the following group: an email address, a phone number,and a pager number.
 20. The portable storage system of claim 18, whereinsaid message address is a member of the following group: a Short MessageService (SMS), pager message, an electronic message, a voice message, avisual message, and a tactile message.
 21. The portable storage systemof claim 18, wherein said communication module being configured toinstruct said hosting computing unit to activate a designated protectionapplication, said designated protection application being configured toprotect information stored on the memory of said hosting computing unit.22. The portable storage system of claim 18, wherein said protectaddress is a member of the following group: encrypt, lock access, anddelete.
 23. The portable storage system of claim 1, wherein said Slaveproximity element is connected to a battery.
 24. The portable storagesystem of claim 1, wherein one of said Master and Slave proximityelements comprises a transmitter, and the other of said Master and Slaveproximity elements comprises a receiver adapted for communication withsaid transmitter.
 25. The portable storage system of claim 24, whereinsaid transmitter is configured for broadcasting an RF signal to saidreceiver, said receiver being configured for receiving said RF signal.26. The portable storage system of claim 24, wherein said transmitter isa radio frequency identification (RFID) transmitter, and said receiveris an RFID receiver.
 27. The portable storage system of claim 24,wherein said transmitter is a Infrared (IR) transmitter, and saidreceiver is an IR receiver.
 28. The portable storage system of claim 24,wherein said transmitter and said receiver perform radio communicationaccording to a Bluetooth® communication protocol.
 29. The portablestorage system of claim 25, wherein said transmitter is a transponderand said receiver is a transceiver, said transmitter configured forbroadcasting said RF signal as a reply signal to an interrogation signalof said transmitter.
 30. A method for preventing the loss of a portablestorage device, comprising: a) determining whether said portable storagedevice is coupled to a loss-prevention unit; b) if said portable storagedevice is not coupled to said loss-prevention unit, determining whetherthe distance between said portable storage device and saidloss-prevention unit is within a predefined proximity threshold; and c)activating an alarm if said portable storage device is not within saidproximity threshold.
 31. The method of claim 30, wherein said activatingis done a predefined time period after said portable storage device hasbeen separated from said loss-prevention unit.
 32. A portable storagedevice, comprising: a main body including a flash memory element; and afirst proximity element configured to communicate with a secondproximity element; wherein one of said proximity elements is configuredto wirelessly poll the presence of the other of said proximity elementswithin a predefined range.
 33. The portable storage device of claim 32,wherein said second proximity element is coupled to a detachable coverwhich is adjusted to fit a portion projecting from said portable storagedevice.
 34. The portable storage device of claim 32, further comprisinga user indication element electrically connected with one of said firstand second proximity elements, said user indication element configuredto activate an alarm when triggered.
 35. The portable storage device ofclaim 34, wherein said one of said proximity elements is configured totrigger said user indication unit when the other of said proximityelements is not detected within said predefined range.
 36. The portablestorage device of claim 35, wherein said user indication unit comprisesa timer element operable to delay said trigger for a predefined timeinterval, said predefined time interval starting at when said other ofsaid proximity elements is not detected within said predefined range.37. The portable storage device of claim 34, wherein said alarmcomprises at least one member of the following group: an audible alarm,a visual alarm, and a tactile alarm.
 38. A portable storage system,comprising: a portable storage device having stored content; aloss-prevention unit; and Master and Slave proximity elements, saidMaster proximity element being physically connected with said portablestorage device, said Slave proximity element being physically connectedwith said loss-prevention unit, said Master proximity element beingconfigured to operate said portable storage device to protect saidstored content when said Slave proximity element is outside a predefinedproximity threshold.
 39. A portable storage system, comprising: aportable storage device having stored content; a loss-prevention unit;and Master and Slave proximity elements, said Master proximity elementbeing physically connected with said portable storage device, said Slaveproximity element being physically connected with said loss-preventionunit, said Master proximity element being configured to operate saidportable storage device to issue a network communication to alert anowner when said Slave proximity element is outside a predefinedproximity threshold.